Igniter for domestic oil burner



July 16, 1935. L. J. CARON IGNITER FOR DOMESTIC OIL BURNERS Filed March30, 1931 l atentecl July 16, I935 UNITED STATES IGNITER FOR. DOMESTICOIL BURNER. Ludger J. Caron, Leominster, Mass, assignor to The AlaskaFreezer 00. 1110., Winchendon,

. Mass, a corporation of Massachusetts Application March 30,

6 Claims.

The principal objects of this invention are to provide an electricigniter suitable for use in domestic oil burners which will not requireas much expense to install as in a construction where a spark is usedand which will cooperate with the burner so as to start the flame andyet not be in a position to be injured materially by the flame.

Other objects and advantages of the invention Will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. l is aplan of a domestic burner having an igniter constructed in accordancewith this invention, and

Fig. 2 is a sectional view on the diametrical line 2-2 of Fig. 1.

I have shown the invention as applied to a well known type of domesticburner comprising a base It? in the form of a casting adapted to beplaced in a kitchen range in place of the grate. This base has shouldersarranged concentrically and perforated metal walls l I supported bythem. The flame is intended to burn in a trough [2 in the casting orbase 16. This trough is shown as annular and open at the top. Underneaththis trough is an electric preheating unit i 3 which is adapted to heatthe oil primarily for the purpose of forming some vapors from it. Theliquid fuel is introduced into the burner through a supply pipe l lwhich entersthe bottom of the trough 12.

The igniting element consists of one or more coils H) of bare wire ofsuch a metal or composition as is adapted to glow when heated by anordinary current of electricity. In this case two of these coils arearranged concentrically and each in the trough l2 but located at oneside, preferably the inner side. Upon heating to m candescence theyignite the fumes from the liquid fuel in the trough which burns in thecenter of the trough. Thus the coils escape the maximum action of thedirect heat on them.

The wiring for this burner is very simple. One terminal [5 of the wire,coming from the power, is connected by an ordinary electrical connectoror binder IT with one end of one of the coils [5 of bare wire. The otherend of this coil, through a similar connection H is connected by a wire[8 with another connection Il The other wire I5 is in circuit with theconnection ll and has a similar connection ll at its other end. The wireI9 leading from this last connection goes to the heating unit l3 throughwhich it passes. and then through a wire 20 to the other terminal 2|. Inthis Way it will be seen that the electricity is 1931, Serial No.526,295

conducted throughout the device inseries, connecting up the two ignitingcoils and the preheating units so that when one of them is connected upall will be.

The igniter is suitable for use with domestic burners and is locatedwithin the trough l2 preheated by the coil IS so that the fumes willrise and these fumes are ignited by the coils !5. As soon as ignited theelectric current can be turned off.

It will be seen therefore that the preheating unit is combined with theignition device in such a way that they always work together but it isto be understood that this igniting device can be used without anypreheating device and that it will work with ordinary fuel oils, whichis vaporized by the igniting coil. As the oil reaches the hot coil itforms a vapor and ignites.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. A hydrocarbon burner having a chamber to which liquid fuel'issupplied, and an electric heating element disposed in said chamber inheat radiating relation to the liquid fuel but entirely above the normallevel of the fuel and out of contact therewith and outside the zone ofnormal combustion of the burner.

2. A combustion tube burner comprising a trough, means to supply liquidfuel thereto, a perforated combustion tube on said trough, an electricheating element disposed in said trough, and means for electricallyinsulating said element from the burner and to support the same adjacentthe bottom of the trough' above the level of the liquid fuel therein,and below the level at'which combustionnormally takes place, saidelement being operable to vaporize the fuel and to ignite it as it isvaporized when initially supplied to said trough.

. 3. A combustion tube burner comprising a base member having ahorizontally "disposed trough, and a perforated combustion tubethereabove, means to supply liquid fuel to said trough,

an electric heating element disposed in said trough, and an insulatingsupport for sustaining said element in proximity to, and above saidliquid level and beneath the lower end of said combustion tube.

4;. A combustion tube burner comp-rising a horizontally disposed trough,and a perforated combustion tube thereabove through the side of whichair is admitted adjacent and above the top edges of the sides of thetrough, means to supply liquid fuel to said trough, a series ofelectrically insulating fingers mounted in said trough and extendingabove the liquid level therein, an electric heating. element mounted onsaid fingers within the trough and supported horizontally thereby inclose proximity to, and above said liquid level, to heat the liquid fuelin the trough and cause vaporization thereof and ignition of the gasformed below the level at which combustion normally takes place.

5. A combustion tube burner comprising .a receptacle having imperforatesidewalls and a horizontally disposed bottom, means for supplying liquidfuel to said receptacle, a perforated combustion tube above saidreceptacle, whereby, in the normal operation of the burner, combustiontakes place only at and above the level at which air is admitted to saidtube, and an electric heating element disposed entirely within saidreceptacle at a substantial distance below said level at which air isadmitted, and positioned and operable to effect vaporization of liquidfuel when initially supplied to said receptacle and ignition of thevaporized fuel.

6. A combustion tube burner comprising a receptacle, means for supplyingliquid fuel over the bottom thereof and a perforated combustion tubeabove said receptacle, said receptacle and combustion tube cooperatingto provide a vaporization chamber below the level of the perforations inthe tube and a combustion chamber above said level, and an electricheating element in said vaporization chamber below the level at whichcombustion normally takes place in the burner and operable to effectvaporization of liquid fuel when initially supplied to said receptacleand ignition of the vaporized fuel.

LUDGER J CARON.

